Function that converts matrix parametrization (internal function).
trans_par(par,lev,k,sup,G2,IPI,mod)regression parameters
vector containing the number of levels of each variable
number of latent states
vectors of support points
internal argument
internal argument
model (0 = LM with stationary transition, 1 = finite mixture)
vector of initial probabilities
transition matrix
parameter vector for AR
sigma of the AR process
regression parameters
Fisher transformation of the autocorrelation coefficient
regression parameters